Who can change brand name

If you are talking about your intention to change the brand name displayed on your listings, then this would be against the Amazon policy.

Whenever any of your product’s features change, you need to create a new listing with it’s own EAN barcode.

Here is the relevant Amazon policy:

You must not use an existing listing for a new version of a product. This includes changes in color, size, material, features, and product name. Instead, create a new product detail page for each new version. For example, a manufacturer updates its streaming media player by adding a new remote control with four buttons instead of two. This is materially different from the older version. It must be listed as a new ASIN.